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NABCEP PV Installer Exam With Complete Solutions Latest Update
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NABCEP PV Installer Exam With Complete SolutionsLatest Update
4 major forms of electrical injuries - ANSWER electrocution (death due to electric
shock), electrical shock, burns, and falls
current - ANSWER flow of electrical charge
voltage - ANSWER Strength of electricity
circuit - ANSWER a full path through which current can flow
You get a shock when - ANSWER you touch two different voltage wires simultaneously.
ground - ANSWER a physical electrical connection to earth
energized (live, "hot") - ANSWER terms similar in meaning that a voltage is present
which may cause a current, so there is a possibility of getting shocked
conductor - ANSWER material in which an electrical current moves with ease
neutral - ANSWER at ground potential (0 volts) because of a connection to ground
if you touch a live wire and are grounded at the same time. - ANSWER You will receive a
shock
When a circuit, electrical component, or equipment is energized - ANSWER a potential
shock hazard is present.
ampere (amp) - ANSWER the unit used to measure current
milliampere (milliamp or mA) - ANSWER 1/1,000 of an ampere
, shocking current - ANSWER electrical current that passes through a part of the body
You will be hurt more if - ANSWER you can't let go of a tool giving a shock.
The longer the shock - ANSWER the greater the injury.
1 milliamp - ANSWER Just a faint tingle.
5 milliamps - ANSWER Slight shock felt. Disturbing, but not painful. Most people can "let
go." However, strong involuntary movements can cause injuries.
6-25 milliamps - ANSWER (women)†Painful shock. Muscular control is lost. This is the
range where "freezing 9-30 milliamps (men) currents" start. It may not be possible to
"let go."
50-150 milliamps - ANSWER Very painful shock, breathing stops, severe muscle
contraction. Flexor muscles may hold in a grip; extensor muscles may cause intense
push away. Death possible.
1,000-4,300 milliamps (1-4.3 amps) - ANSWER Vetricular fibrillation occurs (heart
pumping action not rhythmic). Muscles contract; nerve damage occurs. Death is likely.
10,000 milliamps
(10 amps) - ANSWER Cardiac arrest and severe burns occur. Death probable.
15,000 milliamps
(15 amps) - ANSWER Minimum overcurrent at which an average fuse or circuit breaker
opens a circuit!
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